Tool for compressing valve springs



s. c. HOFF TOOL FOR COMPRESSING V-ALVE SPRINGS Filed Jan. 24. 1922 INVENTOH FF A TTOR/VEYS w re p srnrnnn cam/"In 7 1 roof. roe coarr'nnssina vanvn sranveslf Application filed January at, 1922. seriarnolssiase. f

To all whom it may concern:

Be it known that l, STEPHEN C; Horn, a citizen of the United States, and a resident of Delavan, in the county of Tazewell and State of Illinois, have invented a new and Improved Tool sfor Compressing Valve Springs, of which the following is a full, clear, and exact description.

This invention relates to improvements n tools, particularly to a.tool for compressng valve springs.

An object of the invention is to provide tool of this character including a fixed fork and a movable fork adapted to cooperate in compressing a spring, and to provide means whereby the movable fork is constant ly in parallelism with the fixed fork at all points of travel.

A further object is to provide a tool of this character, which will be simple and practical in construction, strong,- durable and eflicient in use, and comparatively in expensive to manufacture.

Another object is to provide a valve spring compressing tool, whichniay be used in connection with the valve springs of automobile, truck and tractor valves of either the l. or T-head type for the purpose of compressing the sprin to permit disassembling of the valve. I

With these and other objects in view, the invention consists of certain novel features of construction and combinations and arrangements of parts as will be more fully hereinafter described and pointed out in the claims.

In the accompanying drawings:

Figure 1 is a view in side elevation of my improved tool, the dotted lines indicating the position assumed by the movable fork when the handle 2 is depressed; and

Figure 2 is a top plan'view of the tool.

Referring in detail to the drawings, 1 have indicated a pair of handle members 1 and 2. The handle member 1 is integral at one end with a fork such as 3, including a pair of arms adapted to straddle a valve stem. A pair of arms 4: are pivotally connectedto opposite sides of the handle 1 ad-..

jacent the fork 3. cross pin 5 may be selectively mounted in either of a pair of openings 6 in the arms. This cross pin forms a fulcrum for the handle lever 2, which straddles and is pivotally connected to a movable fork 8, through the medium of a pin 11. The fork 8 includes a pair of OF DELAVAN, ILLINQIS.

' arms 9 having oppositely disposed recesses 12 in their upper facesadapted toprovide a seat for the conventional type of washer ordinarily employed on motor valves. The fork 8 is guided in its movement by a pair of parallel pins 7 fixed to the handle 1 adjacent the fork 3, accommodated in openings in the fork 8.

The manner of use of the tool is as follows: The forks 3 and 8 are inserted around the valve stem. Operation of the handle lever 52 will tend to move the fork 8 away from the fork 3 pressing the valve spring and permitting the removal of the usual locking device and the disassembling of the valve. The arms 4 are pivoted so that the fulcrum 5. is moved, thereby insuringcon stant parallelism betweenthe two forks and preventing binding upon the posts or pins 7. In compressing the springs of unusually large valves, the fulcrum pin 5 may be inserted in the other pair of registering openings 6 in the arms 4 to increase the range of movement of the fork 8. The movement of the fork 8 is ordinarily limited by the engagement of the handle lever 2 with the handle 1. 7

Although I have illustrated one of the preferred embodiments of my invention, it will be apparent that various slight changes and alterations might be made in the general form and arrangement of the parts described without departing from the invention and hence I do not wish to limit myself to the precise details set forth, but, shall consider myself at liberty to make such slight changes and alterations as fairly fall within the spirit and scope of the appended claims.

It is to be noted-in conclusion that the openings in.the upper fork 8 are a trifle larger than the pins 7 which they accomo-v date so that when the spring is compressed, it will serve to cause the fork 8 to bind against the pins 7, thus automatically looking the spring against expansion.

I claim:

1. In a tool of the class described, a fixed fork and'a movable fork, and means whereby said forks are constantly in parallelism, said means including means on the fixed fork for guiding the movement of the movable fork, and a lever having a swin ing fulcrum and pivoted to the movable fork. 7

2. In a tool of the class described, afixed fork and a movable fork, and means whereby said forks are constantly in parallelism,

said means including pins carried by the fixed fork passing tln'ough' and guiding the movement of the movable fork,.and a lever pivoted to the movable fork and having an adjustable and swinging fulerum.

' 3. In atool of the class described, a fixed forlrand amovable fork and means whereby said forlis are constantlyin parallelism, said meansfin cluding pins carriedby the fixed fork passing through and guiding the movement of the movable fork, a lever pivotally' connected to the'movable fork, and movable 7 e-eases means Whereon said lever is fulcruined.

4:. In a tool of the class described, a fixed fork and a movable fork, and means whereby said forks are constantly in parallelism, said means including pins. carried by the fixed fork passing through and guiding the movement of the movable fork, a lever pivotally connected to the movable fork, a handle integral'vvith the fixed fork, and a pairof movable arms pivoted on, the handle and upon which the lever is adiustably fulcrumed,

STEPHEN CALVIN HOFF. 

